Carpenter&#39;s bench clamp



fl,449.552 M. J. SAMPSON Y CARPENTER'S BENCH CLAMP Filed Nov. 15, 1930 2 sheets-sheet l Zhc' 7220 1" 4% 2 M. J. SAMPSON CARPENTER'S BENCH CLAMP Filed Nov. 15, 1920 2 sheets-sheet 2 Patented Mar. 27, 1923.

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MELVIN J. SAMPSON,

CARPENT EB S Application filed. November To all wit-omit may concern:

Be it known that I, MELVIN J. SAMrsoN, a citizen of the United States, and resident of Clevelanchin the county of (luyahoga and State of Ohio, have invented certain new and useful Improvements in Carpenters Bench Clamps, of which I hereby declare the following to be a full, clear, and exact description, such as will enable othersskilled in the art to which it a-ppertains to make and use the same.

The objects of this invention are to provide an improved form of carpenters clamp, by means of which thick or thin, or long or short strips of wood can be held equally well between a fixed, guard and a movable clamping member, while planing or chiseling them into shape, and in one method of use they are held between parallel members, one of which is movable in a plane inclined towards the other.

By this means, the ends or faces of wooden strips are not marred in any way. The clamping member is also adjustable to form a rigid abutment having a guiding face against which the strip of wood or timber can rest while the operator is at work.

The invention has reference to a metal plate upon which a guide member having a straight edge or flange is detachably mounted in adjusted positions and in which a movable clamping member having a straight edge and a terminal abutment travels in a diagonal slot in the said plate adjacent to said guard member. 7

lVhen a wooden strip is inserted between the aforesaid straight edges and placed against said abutment on said clamping member and pressure is exerted, the clamping member will take a position parallel with the guide member, if the sides of the strip are parallel, and the clamping member will move diagonally forward and. towards the guide member, thus gripping the strip between the straight edges.

The clamping member swings freely upon a pivot movable in said slot, and therefore will adapt itself to engage the side of the OF CLEVELAND, OHIO.

BENCH CLAMP.

15, 1920. Serial No. 424,108.

wooden strip opposite the side engaged by the guiding member if the sides of the wooden strip are not parallel. I

The outer extremity of the clamping meni' beris also adapted to serve as an abutment for a plank or wooden strip when it is not 4' necessary to clamp the same.

The invention is hereinafter more fully described, illustrated in the accompanying drawings, and specifically pointed out in the claims. I i

In the accompanying drawings, Fig. 1 is a plan of the metal plate on which the parts are assembled; Fig. 2 is, a plan of the asseme bled parts, showing two short pieces of wood clamped together; Fig. 3is a side elevation of the same; Fig. 4e as a longitudinal section-thereof; Figs. 5 and 6 are a side eleation and plan, respectively, of the clamping member; Figs. 7 and 8 are bottomviewand longitudinal section ofthe spring actuated detent; Fig. 9 illustrates the use of the device for: clamping a thin plank in place, without injury; Fig. 10 is a similar view showing the outer end of the clamping member employed as an abutment, against which a plank lying upon the bench rests.

In these views, A'is a metal plate, embedded in the bench. In this plate is cut longitudinally inclined slot, B, and adjacent to this slot are cut longitudinal slots, C, C. and parallel therewith slots, C, J, in which groups of slots the straight-sided guard member D, is detachably and selectively secured by means of the hooked lugs, D, D.

E is the clamping member which has a straight portion, E and terminal lugs, the forward one of which, F, extends towards the guard member, D, and the outer one of which extends away from the said member.

The clamping bar is provided with a pivot pin, E, which slides inthe inclined slot, B, and a head upon this pin prevents it from coming out of the slot. An enlargement of the slot permits of the introduction of the pin into the groove.

In use, when a strip of wood is introduced between the guard and clamping members and pressure is applied, the forward end of the stick will press against the lug, F, and the clamping member, will move forward in the groove and its side will also accommodate itself closely to the side of the wooden strip and clamp it closely in lace.

p In Fig. 2, two such pieces of wood are shown, and in Fig. 9 a very thin one.

In Fig. 10 a plank abuts against the outwardly turned outer extremity of the clamping member. These members can be removed from the plate when not in use, so that the surface of the bench will remain perfectly smooth for future wor A modification of the old type of bench dog is shown in Figs. 7 and 8, where the keeper plate is shown mounted upon a hinge, H, in an opening in a base plate, and pressed by a spring. When a holding screw passing through this keeper plate and through a transverse bar on the base plate is loosened, the toothed edge of the keeper will rise and reversely will fall, thus making the action simple and effective in use. In Fig. 10 in dotted lines the clamping arm E is shown drawn out to enable the pivot E to lie at the outer end of the slot B. p

This permits the outer end F to overhang the guide D, and a metered or bevelled piece of wood can be inserted between the now inclined arm E and the guide without open ing the auto end of the clamp or permitting the wood to escape since it can not pass beyond the pivot.

To accomplish this action the outer end of the slot is located closely adjacent to the outer end of the guide and a lateral recess is cut in the clamping arm adjacent to the projecting part F.

Having described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a bench clamp, a bench top, a metal plate, an abutment or guide rigidly secured thereon, said plate provided with a diagonal slot terminating adjacent to the outer end of said abutment, and a swinging clamping arm provided with a pivot pin movable in said slot, the said clamping arm, provided with a lateral projection at its outer end,'and having its outer end curved away from said abutment, and having a straight body portion and having its inner end turned laterally away from said abutment, substantially as and for the purpose described.

2. In a carpenters bench clamp, the'cornbination with said bench and a plate at tached thereto, of a vertical guide rigidly attached to said plate, said plate provided with a diagonal slot extending therethrough and having its front end closely adjacent to the front end of said guide, and its rear end opposite the rear end of said guide, and a swinging clamping arm, said arm provided with a pivot pin slidable insaid slot, and also provided with a lateral projection at its outer end and inner side. and with a lateral recess adjacent to said lateral projection.

In testimony whereof, I hereunto set my hand this 21 day of October, 1920.

MELVIN J. SAMPSON. In presence of S. W. SANGSTER, WM. M. MONROE. 

